//
//  AppDelegate.swift
//  weibo
//
//  Created by 杨佐堂 on 2019/10/5.
//  Copyright © 2019 yangzuotang. All rights reserved.
//

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        
        window = UIWindow()
        window?.backgroundColor = UIColor.white
        
        window?.rootViewController = WBMainViewController()
        window?.makeKeyAndVisible()
        loadAppInfo()
        
        return true
    }

}
extension AppDelegate {
    private func loadAppInfo() {
//        1.模拟异步
        DispatchQueue.global().async {
            // 1> url
            let url = Bundle.main.url(forResource: "main.json", withExtension: nil)
            // 2> data
            let data = NSData(contentsOf: url!)
            // 3> 写入磁盘
            let docDir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
            let jsonPath = (docDir as NSString).appendingPathComponent("main.json")
            data?.write(toFile: jsonPath, atomically: true)
            print("应用从网络加载main.json数据成功 \(jsonPath)")
            
        }
    }
}
